Table for ore and coal washing.



, T A B L E F 0 R 0 R E A N D C 0 A L W A S H N G.

APPLICATION FILED MAY 31, I913 LIQQQUQD Patented Apr. 18, 1916.

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APPLICATION HLED MAY 31' 1913.

Patented Apr. 18, 1916.

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c. E. THOMPSON. NG TABLE FOR ORE AND COAL WASHI 13. APPLICATION FILED MAY 31. I9

Patented Apr. 18, 1916.

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WA HINUTO I mmw C E. THOMPSON.

TABLE FOR ORE AND COAL WASHING.

APPLlCATION FILED MAY 3!. 1913.

Patented Apr. 18, 1916.

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srarrne raarnnar oririion CHARLES E. THOMPSON, OF DENVER, COLORADO, ASSIGNOR TO THE MINE & SHELTER SUPPLY COMIPANY, 0F DENVER, COLORADO, A CORPORATION OF COLORADO.

TABLE FOR ORE AND COAL WASHING.

Application filed May 31, 1913.

1 0 all whom it may concern:

Be it known that 1, CHARLES E. THOMP- SON, a citizen of the United States, residing at the city and county of Denver and State of Colorado, have invented certain new and useful Improvements in Tables for Ore and Coal W'ashing, of which the following is a specification.

My invention relates to an improvement in transversely inclined reciprocating concentrating or washing tables for washing coal, it being a table the surface of which changes diagonally thereacross along two or inore lines suitably spaced, whereby the surface of the table is subdivided into a plurality of fields or areas of varying formations, whereby a table is provided of superior efficiency, capacity and effectiveness in washing, cleaning and separating the material to be treated.

With these objects in view, my invention. comprises a table, the surface of which is characterized by a plurality of areas or planes rifiied throughout, but the height of which riflies varies over certain areas and is uniform over others, the lines separating these fields or areas extending diagonally across the surface of the table, and intersecting the riflies at points where the latter are of uniform heigh My invention further consists of means of flexing the table along one or more of these diagonal lines.

In the accompanying drawings :F igure 1 is a plan view, Figs. 2, 3, f and i are longitudinal sectional views taken at different points throughout the length of the table to show the relative height and taper of the rifi les at different areas, Figs. 5, 6, 7 and 8 are transverse sections, and Fig. 9 is a plan view of the table frame with the riffie surface removed to show the frame-work construction.

T he surface of the table 1 is preferably riffled throughout, and in the form of the table illustratedwhich is one of many possible exemplifications of my invention-the riflies at the feed or head end start at the feed-box 2 at the upper right-hand corner, preferably at a height of seven-sixteenths 2 of an inch, gradually increasing in height across the head end of the table to five-eighths (-3) inch in height at the lower discharge side; and from this head end the riflies gradually taper more or less abruptly Specification of Letters Patent.

Patented Apr. 1%, 191MB.

Serial No. 771,008.

in the neighborhood of the feed-box, and much more gradually at the lower discharge side, so that from the upper to the lower side these riflles-reach a uniform height along an advancing or diagonal. line as indicated by the dotted lines 6-6, where they are all preferably three-eighths of an inch high, thus forming a field or area E at the head end of the table more or less triangular. From this diagonal or advancing line 6-45 of uniform height in the rifiies, the riflles continue at uniform height, those at the upper side of greater length and gradually decreasing toward the lower discharge side of the table until they reach a diagonal line indicated by the dotted line 7- of advancing terminals forming a field or area B, over which all portions of rifiies of varying length are of uniform height. From the line 7-7 the riflles taper preferably from a uniform height of three-eighths of an inch diagonally across the table to a uniform height of one-eighth of an inch at the advancing line of change in elevation indicated by the dotted lines 8-8, forming the field or area C, and from this line 8-8 to the discharge end of the table the rifl'les are again of uniform height forming the area D of relatively shallow riflies.

The head-motion (not shown) is as usual at the feed end of the table, imparting a reciprocating motion lengthwise of the latter. The table is transversely inclined, having a side wash of water transversely across the rifl'les and the fields or areas E, B, C and D, and the heavier material discharges at the end opposite from the headmotion, and the lighter across the lower discharge side.

It may be desirable to flex the table along the lines 6-6, 77, 8-8 between the several fields or areas as shown in Fig. 9, any

approved means being used for effecting this flexing, which it may be stated may be found desirable along only one or more of these dividing lines.

A table of this construction is more particularly adapted for washing culm or finely broken coal for the removal of bone or slate or incombustible material therefrom, and the bone or ash being of the greater specific gravity passes over the end of the machine while the coal to be saved in two or more grades is discharged over the major portion of the discharge side or edge of the table.

l Vhile I have described with some par ticularity the preferred relative height and proportions, I do not by any means wish tobe confined to these dimensions, as these re lations and proportions, while desirable for the greatest efficiency so far as experiments already made and the results analyzed have proven, nevertheless, with larger sizes of material to be treated, of course the height of riffies may be advantageously increased; and with the finest of culms worth saving the same might likewise be decreased while maintaining the same general relativity which seems desirable.

The effect of tapering or gradually reduc ing the height of rilfles is well known in the art of concentration in the type to which this table belongs, for, with the gradual shallowing of the grooves, more and more of the material is exposed to the side flow or wash of water, so that the lighter is being poured off and carried down the slope of the table for retreat1nent. This operation continually repeats itself on the table surface, whereas the channels of uniform depth in the alternate areas serve more or less as conveyers to conduct the material to the next area in which the riffles gradually diminish in height.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A table for ore and coal washing, the entire surface of which is riflled from one end of the table to the other, forming alternate areas across the table in which the riffles are uniform and tapering, one of these areas having the tapering rifile located at the feed end and one area in which the riffies are of uniform height located at the opposite or concentrates discharge end, the mergers between uniform and tapering riffies forming diagonal lines across the table.

2. A table for ore and coal washing, the entire surface of which is riiiled from one end of the table to the other, forming alternate areas across the table in which the rif- "fles are uniform and tapering, one of these areas having the tapering riffie located at the feed end and one area in which the riffies are of uniform height located at the opposite or concentrates discharge end, the mergers between uniform and tapering rififies forming diagonal and non-parallel lines across the table.

3. A table for ore and coal washing, the entire surface of which is rifiied, said rifiled surface divided into a plurality of different areas, the boundaries or dividing lines between which are diagonal and non-parallel, the riflles in alternate areas diminishing in height, and in the remaining areas of uniform height.

l. A table for ore and coal washing, the entire surface of which is rifiled, said riflled surface divided into a plurality of different areas, the boundaries or dividing lines between which are non-parallel, the rifiles in alternate areas diminishing in height, and in the remaining areas of uniform height, the riffies in the areas in which the height of riflie is uniform corresponding in height throughout their length with the lowest point of the tapered riiiles, toward the headmotion end of the table, of which they are continuations.

In testimony whereof I afiix my signature, in the presence of two witnesses.

CHARLES E. THOMPSON.

Witnesses FRANK PRESTIDGE, GEORGE L. Honors.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

